Avoid IP Address Conflicts – Howtoshtab – how to, lifehacks, tips and tricks

Do you have to deal with IP address conflicts on a daily basis? Are mobile devices in the workplace leading to an increase in duplicate IP’s? Are human errors resulting in incorrect address assignments? Does that outdated spreadsheet make you want to scream? If you answered “Yes” to any of these questions, then you know how difficult it is to manage IP addresses. An IP address conflict happens when two or more devices in your network have have the same IP Address.

This will cause the affected machines to experience erratic or complete loss of network connectivity. The fact is—IP address conflicts can wreak havoc on your network. And they can impact any system on the network that has the misfortune of having a duplicate IP address, including laptops, printers, VoIP phones, and critical servers. Imagine the business impact if one of your mission-critical services goes down due to an IP address conflict! There are several main causes of IP address conflicts. Bring-Your-Own-Device (or BYOD) phenomenon is typically a “home” laptop or tablet that still has a static IP address assigned. This may generate a duplicate IP when connecting to the corporate network. A DHCP Server misconfiguration occurs when two DHCP servers are managing the same IP subnet or segment with overlapping IP addresses. And there’s always human error such as a Network admin that makes a mistake when assigning an IP or forgets to update the spreadsheet.

Resolving IP address conflicts can be time-consuming and extremely frustrating. First, you must determine which two machines or devices caused the conflict and find the associated MAC addresses. If you’re fortunate enough to have the MAC address, the first step would be to unplug one of the devices. Then, use another machine within the same subnet to PING the IP address in question. In some cases, there will be no DNS name provided or the ICMP protocol is blocked on the firewall. with the mac address information you can go to the switch or wireless AP and block that port. Doing this will allow the original device to use its correct IP address without the second device vying for it. Instead of doing this manually, why not have IPAM do it for you? With it’s active IP conflict detection and immediate alerting capabilities, SolarWinds IP Address Manager can protect your network from IP address conflicts.

Identify and resolve conflicts before they cause a major network disruption in your environment. Visit www.solarwinds.com for a free trial of IP Address Manager..

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